The Simple Mathematical Model for Prediction of Rain Attenuation in Microwave and Millimeter Wave Frequencies

摘要

The mathematical model is developed by non-linear regression using least square curve fitting on extinction cross section data derived from modified Pruppacher-and-Pitter raindrop model using finite element method in microwave and millimeter wave frequencies ranging from 1 GHz to 100 GHz with mean raindrop radii from 0.25 mm to 3.5 mm for horizontal and vertical polarizations. This model gives results with good accuracy for calculating extinction cross section of raindrop and then it is applied on various raindrop size distributions for prediction of specific rain attenuation. The results of specific rain attenuation are compared with reported experimental data as well as model and found to be very close agreement.